Answer
R has 512 subsets.
Work Step by Step
R={2, 4, 6, 8, 10, 12, 14, 16, 18}
R has 9 members, so R has $2^9=512$ subsets.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 3 - Solving Inequalities - 3-5 Working with Sets - Practice and Problem-Solving Exercises - Page 199: 51
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